The Tibetan Thangka painting finds its roots from the folk arts of pata and mandala. Even with its Indian base, it reached its zenith under the Nepalese and the Chinese artists. In the 7th century, buddhism developed as an art form under the reign of Songsten Gampo. His atelier included both Nepalese and Chinese artists and developed a style which included elements from both. During the 11th century, the Kashmiri monk Rinchen Zangpo introduced artists from Kashmir to Tibet. Together the Thangka painting was influenced by the central Indian, Kashmiri, Nepalese and its own indigenous art style which continued well into the 17th century. From the beginnings of the 18th century, the Chinese influence on the painting tradition also started to be felt.